Terahertz radiation refers to electromagnetic waves in the frequency range between infrared and microwave radiation, typically spanning from 0.1 to 10 THz. This type of radiation has unique properties that make it highly suitable for a variety of applications, such as imaging, spectroscopy, communication, and sensing. Terahertz radiation can penetrate various materials, including clothing, paper, and plastic, making it useful for security screening and medical imaging. Researchers are exploring ways to generate, manipulate, and detect terahertz radiation more efficiently and effectively, leading to advancements in various fields, including technology, healthcare, and security.